Stapler



FIG. 1 is a perspective view showing the top side, the left side and the front of the stapler according to the invention;

FIG. 2 is a perspective view showing the underside, the right side and the front of the stapler; and,

FIG. 3 is a perspective view showing the top side, the left side and the rear side of the stapler. 

The ornamental design for a stapler, as shown and described. 